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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "node_stat_watcher.h"
#include "async_wrap-inl.h"
#include "env-inl.h"
#include "memory_tracker-inl.h"
#include "node_external_reference.h"
#include "node_file-inl.h"
#include "permission/permission.h"
#include "util-inl.h"
#include <cstring>
#include <cstdlib>
namespace node {
using v8::Context;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::Object;
using v8::ObjectTemplate;
using v8::Uint32;
using v8::Value;
void StatWatcher::CreatePerIsolateProperties(IsolateData* isolate_data,
Local<ObjectTemplate> target) {
Isolate* isolate = isolate_data->isolate();
Local<FunctionTemplate> t = NewFunctionTemplate(isolate, StatWatcher::New);
t->InstanceTemplate()->SetInternalFieldCount(
StatWatcher::kInternalFieldCount);
t->Inherit(HandleWrap::GetConstructorTemplate(isolate_data));
SetProtoMethod(isolate, t, "start", StatWatcher::Start);
SetConstructorFunction(isolate, target, "StatWatcher", t);
}
void StatWatcher::RegisterExternalReferences(
ExternalReferenceRegistry* registry) {
registry->Register(StatWatcher::New);
registry->Register(StatWatcher::Start);
}
StatWatcher::StatWatcher(fs::BindingData* binding_data,
Local<Object> wrap,
bool use_bigint)
: HandleWrap(binding_data->env(),
wrap,
reinterpret_cast<uv_handle_t*>(&watcher_),
AsyncWrap::PROVIDER_STATWATCHER),
use_bigint_(use_bigint),
binding_data_(binding_data) {
CHECK_EQ(0, uv_fs_poll_init(env()->event_loop(), &watcher_));
}
void StatWatcher::Callback(uv_fs_poll_t* handle,
int status,
const uv_stat_t* prev,
const uv_stat_t* curr) {
StatWatcher* wrap = ContainerOf(&StatWatcher::watcher_, handle);
Environment* env = wrap->env();
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Value> arr = fs::FillGlobalStatsArray(
wrap->binding_data_.get(), wrap->use_bigint_, curr);
USE(fs::FillGlobalStatsArray(
wrap->binding_data_.get(), wrap->use_bigint_, prev, true));
Local<Value> argv[2] = { Integer::New(env->isolate(), status), arr };
wrap->MakeCallback(env->onchange_string(), arraysize(argv), argv);
}
void StatWatcher::New(const FunctionCallbackInfo<Value>& args) {
CHECK(args.IsConstructCall());
fs::BindingData* binding_data = Realm::GetBindingData<fs::BindingData>(args);
new StatWatcher(binding_data, args.This(), args[0]->IsTrue());
}
// wrap.start(filename, interval)
void StatWatcher::Start(const FunctionCallbackInfo<Value>& args) {
CHECK_EQ(args.Length(), 2);
StatWatcher* wrap;
ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
CHECK(!uv_is_active(wrap->GetHandle()));
node::Utf8Value path(args.GetIsolate(), args[0]);
CHECK_NOT_NULL(*path);
THROW_IF_INSUFFICIENT_PERMISSIONS(
wrap->env(),
permission::PermissionScope::kFileSystemRead,
path.ToStringView());
CHECK(args[1]->IsUint32());
const uint32_t interval = args[1].As<Uint32>()->Value();
// Note that uv_fs_poll_start does not return ENOENT, we are handling
// mostly memory errors here.
const int err = uv_fs_poll_start(&wrap->watcher_, Callback, *path, interval);
if (err != 0) {
args.GetReturnValue().Set(err);
}
}
} // namespace node
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